I took a couple minutes to measure the hardware since the question comes up so often…
Air = 133 mm (5-1/4 in) high and 64 mm (2.5 in) in diameter
Sky = 95 mm (3-3/4 in) in diameter at its widest point and 200 mm (8 in) high
Air = 172g without batteries, and 232g with batteries
Sky = 417g without batteries, and 536g with batteries
The pole mount for the Sky weighs 71g if that matters to anybody.